Glossary

Term	Definition
Account	Balance-owning unit associated with a customer or business uid
USER	Customer wallet account type
BUSINESS	Merchant or operational payment account type
Deposit Address	Network-specific address allocated to an account
Asset Type	User-facing economic asset such as USDT or ETH
Network	Blockchain environment such as Ethereum Sepolia
Asset	An asset type deployed on a particular network
Atomic / Raw Unit	Smallest integer unit of an asset
Balance	Current available and reserved position for an account and asset type
Ledger	Append-only journal of finalized balance movements
Internal Transfer	OOLIN account-to-account movement without an external blockchain transfer
External Withdrawal	Asynchronous transfer to an outside blockchain address
client_request_id	Customer-generated unique mutation identifier used for recovery
Cursor	Last processed ID used for incremental synchronization
HMAC	Keyed hash used to authenticate request content
Nonce	Per-request unique value that prevents replay

For field-level definitions, use the API Reference.

Relationship summary

One uid can be associated with one or more Accounts. An Account owns balances and deposit addresses. A deposit address is network-specific, while a balance is normally asset-type-specific. Deposits, internal transfers, and withdrawals are workflow records; their finalized accounting effects are immutable Ledger entries. A cursor is a synchronization checkpoint, not a transaction status.

Keeping these concepts separate prevents common modeling errors such as storing a network address as the wallet itself, treating the current balance as transaction history, or treating a list cursor as proof that a pending record completed.